The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Oct. 05, 2004

Filed:

Sep. 18, 2000
Applicant:
Inventors:

Harald Brandt, Hägersten, SE;

Zsolt Haraszti, Cary, NC (US);

Rui Castro, Porto, PT;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 1/228 ;
U.S. Cl.
CPC ...
H04L 1/228 ;
Abstract

An Internet Protocol network having service differentiation depending on whether or not a flow in the network is a real-time flow. An aggregated flow within the Internet Protocol network passes through a flow classifier before entering a node. The flow classifier distinguishes the aggregated flow into set of flows, each flow corresponding to a unidirectional packet stream from a single session. The flow classifier then executes at least one of a plurality of checks including: checking payload size; checking for static behavior in header fields that are predictably constant if the flow is a real-time flow; and checking for incremental behavior of header fields, which predictably increment if the flow is a real-time flow. Based on the checks, the flow classifier decides whether the flow is a real-time flow or a non-real-time flow.


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